Hot-air stove



C. C. LILLIBRlDGE.

HOT AIR STOVE.

APPLICATION HLED'NOW 3, 1919.

l,8'78,@%3, Patented May 17,1921.

icun mis' cifr inmnurnen, or HI'ITG INSon KANsAs-F HOT-AIR STOVE,

T0 aZZwhmnitma-g concern: g

Be it known that 1, (loans 0. 11111131- Biunema citizen of the UnitedStates, residing at Hutchinson, in the county of Reno and State of Kansas, have invented certain new and useful Improvements inIHot-Air Stoves; and I-do declare the following to be a full; clear, and exact descriptionof the 1 invention, such as will enable others skilled in the art to which it appertains to -make and use the same. I f V This inventionrelates to improvements in hot air heating stoves, and it .has more particular reference to a stove which isdesigned to use liquid fuel, although any other fuel may be used equally as well. I The principal object of the invention is to increase the heating capa'cityof the stove by the employment of a novel arrangement of heatabsorbing and radiating surfaces within the combustion chamberof the stove, f

' whereby cold air passing into the stoive will be thoroughly heated before its passage out of the stove andlinto the room or other place to be heated. p 7 I A further object of the invention is to provide means carried by thehot air circulating pipef'and disposed adjacent the smoke outlet; which serves toprevent rapid escape of the'products of combustion throughthe smoke pipe and also-retains the products of combustion in contact wlth the air pipe and more thoroughly heats it.

In the accompanying drawings forming a part of this application and 111 which hke numerals are employed to. designate like parts throughout the same,

Figure 1is a central vertical section of-a heating stove equipped with'my improved devices. 7

Fig. 2 is a transverse section on the plane of theline 2-2 of Fig. 1.

Fig. 3 is a like View on the plane of the line 3-3 of Fig. 1.

In the drawings I have shown a heating stove S equipped with a liquid fuel burner B such as disclosed in my co-pending application filed November 3, 1919, Serial No. 335,369, and also equipped wlth automatlc cut off mechanism 0 such as disclosed in my U. S. Patent 1,334,251 of March 16, 1920.

The stove S includes a vertical casing having an air inlet opening 1 in its side wall, which is preferably disposed a httle below the center of its height, and it 1s also provided at its top with a'hot air outlet Ap plication filed November Seria I No. Z3f5li3l7s Specification of lettersl atent. r

o iaii awhic iispl ertmtiy dis sed at 'i i i 'llll6 center ofthe sto'vei "It'is .aiso' rovidd with the usual} sinokeii o'utlet .op aingn above the air1i-n1a1 inclining upwardly from the opening 1 and commainlcating with the opening 2 at; the top is an air cir-' culatingpipe or fiue 3'whi ch is of approxi- 1 mately the 'sa1ne-v diameter throughout its 5 length. At the backfofthestoveaconcave shell i ls cast integralor otherwisesecured Y theret its upper end beingflclosed and, covering the opening 1, an'd itsloiwer. end being 1; 'i openand disposedadjacentthe; floor, as i illustrated.. Withthis construction itwill 1 be'fseen that air rising from the floor will pass upwardly .through the shell coming openings 5 into vthejro )n1. Such heating of the air is duetotheg lfactthat-theflue 3, is disposed within the" combustion chamber of" xthe stove jand' is exposedjpartiallyto the flames and excessive heat from the'burner B wh-ich thoroughly heats, it,; consequently thereby becoming partially heated beforeits passage through the; flue. '3, whereinit is highly heated before its passage out of the heating the j-air' that passes@through ;it.;.- V Preferably cast integral'with the'pipe'3 andv arranged at, spaced intervals entirely around. 1 .3111 9 a plurahty of heat-;absorb1 ng:,-ribs 'or fins 6 which" serve arr-important part vof this 1I1V611tl01'1. That is,jthese ribs project outwardly from the surface of the fliieand are in close proximity to the flames of the burner B and the rising flames will be held 7 in the space between the ribs, thereby being retained in directcont'act with'the flue from 1 its bottomto its top and more effectively heating the fiue and the air which passes therethrough. These ribsnot only serve to retain the flames in effective contactwith the pipe 3, but they themselves become re'dl- 7 hot; and ahsorba-great amountof heat and transmit it to the interior of the flue to superheat the air which] passes there} through. Hence it will be seen that this construction greatly increases the. exterior heating surface of flue and absorbs the! 'heat from the fire more rapidly than if otherwise constructed.- It is to be noticed: that these ribs are arranged on-the exterior surface of the fine and they do notin any way decrease or interfere with. the/free pas-' sage of air through the fine.

I have'found that 'n heatl V ng stoves of the ordinary construction, a great amount of heat is wasted, duetol the fact-that passes V out through the smoke flue. [I have provided means to-prevent, as much as-possible, rapid escape of the particles of combustion. Tothis end I provide an oppositely tapered A heat deflecting yond the opposite sides of the fin." This slot '9'serv'es to permit a retarded passage of the v f produc'ts of combustion thercthrough. Most of the particles of combustion rising from the 'burnerB-will becaught beneath the deflecting plate or battle 8 and will very gradually' escape "to the smoke fiue through the opening 9 and around the'outer edges of said ;.'plate. Hence,"-it-will be seen that rapid escape ofthe product's of-combustion will be 'pr'eventedfas the baflie 8 will form a pocket v and tendto.deflect-fandretard the flow of a portion of the products of combustion. This platewill also tend to keep the fin 7 red hot at all times.

"8 in place I provide it withauupturned In order 7 to secure this battle flange 10 which restsja gainst the'inner surfaceof the wall of-the stove casing and whichis secured thereto in a manner as will hereinafter be descr1bed.

- The fuel supply'tank 11 is supported by means of an outwardly extending shelf 12 which is provided on its inner endwith a downturned "flange 1 3"which bears against '-"the outer surface of the stove casing wall. Bolts 14: are passed through the flanges 10 and Band through the casing wall, thereby retaining" the plate 8" and shelf 12 in position. The shelf 12 is supported by means of abrace 15. I V

Inasmuch as a stove of this character and construction becomes very hot, I have found it advisable to afford protection for the tank 11 which may otherwise become over-heated V and explode so I attach a suitable shield 16 to the shelf 12 between the tank and the body of the stove and this shield prevents the tank from becoming excessively heated, as is obvious. I claim: 7 V I A stove comprising a vertical cylindrical casing having an air inlet opening in its sidewall, a hot air outlet opening in its top and a'sm'oke outlet opening in said side wall above said air inlet opening, a hot air circulating pipe-in the casing extending upwardly at an incline from said air inlet opening to said hot air outlet opening'and provided on its exterior with longitudinally extending fins, an additional downwardly tapered fin carried by said hot air pipe in the angle between the'same and the casing wall and forming a support having a horizontal upperend, and ,a horizontal deflecting plate carried by said fin and extending between the wall and pipe and resting-upon the upper end of the supporting fin and curved to conform to the contour of the wall and the adjacent part of the hot air pipe, J

said plate being provided with a slot extending beyond the sides of the supporting fin to provide an auxiliary air passage.

In testimony whereof I have hereunto set my hand. I V a CURTIS QLILLIBRIDGE. 

